{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4322",
    "entityType": "User",
    "nonce": "0x57c538418fafb7b390a5538726d050bc15d3bfdcc5a2bb4dc8766907bae17987",
    "signature": "0x01e9bc2665c5b71d87bcb43b4c41d7f36ba404ca8fb90f9f3ba93a7f2c0246ea59b2d4152571eba6976910217b5bfd3171d86764a13e02a98b4308441336b0331b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}